std::inplace_vector<T,N>:: unchecked_push_back

Appends the given element value to the end of the container.

Equivalent to: return * try_push_back ( std:: forward < decltype ( value ) > ( value ) ) ;

Before the call to these functions size ( ) < capacity ( ) must be true . Otherwise, the behavior is undefined.

No iterators or references are invalidated, except end() , which is invalidated if the insertion occurs.

Parameters

Return value

back() , i.e. a reference to the inserted element.

Complexity

Constant.

Exceptions

Any exception thrown by initialization of inserted element.

If an exception is thrown for any reason, these functions have no effect ( strong exception safety guarantee ).

Notes

Example

#include <cassert>
#include <inplace_vector>
#include <string>
 
int main()
{
    std::inplace_vector<std::string, 2> fauna;
    std::string dog{"dog"};
 
    auto& r1 = fauna.unchecked_push_back("cat"); // overload (1)
    assert(r1 == "cat" and fauna.size() == 1);
    auto& r2 = fauna.unchecked_push_back(std::move(dog)); // overload (2)
    assert(r2 == "dog" and fauna.size() == 2);
    assert(fauna[0] == "cat" and fauna[1] == "dog");
    // fauna.unchecked_push_back("bug"); // undefined behavior: there is no space
}

See also